Knife-spacer for paper-stock engines.



No. 723,763. PATEN'IED MAR. 24, 1903.

` M. P. VAN RYZIN 6r H. G. SAEGKER.

KNIFE SPACER POB. PAPER STOCK ENGINES.

APPLICATION FILED JAN. 22, 1903.

N0 MODEL.

NTTED STATES PATENT OFFICE.

MARTIN P. VAN RYVZI-N AND HERMAN G. SAECKER, OF APPLETON, WISCONSIN.

KNiFE-SPACER Foa PAPER-STOCK ENGINES.

SPECIFICATION forming part of Letters Patent N o. 723,763, dated March24, 1903.

VApplication filed January 22, 1903. Serial No. 140,059. (No model.)

To all whom, it may concern:

Be it known that we, MARTIN P. VAN RYZIN and HERMAN G. SAECKER, citizensof the United States, and residents of Appleton, in the county ofOutagamie and State of Wisconsin, have invented certain new and usefulImprovements in Knife-Spacers for Paper- Stock Engines; and we do herebydeclare that the following is a full, clear, and exact descriptionthereof.

Heretofore it has been common tp employ built-up wood spacers betweenthe knives of shells of paper-stock engines, the veneer ply or plies ofeach spacer being outermost, so as to be readily removed by strippingwhen said knives are narrowed by wear. The builtup spacers employedbetween angular knives have been heretofore cross-kerfed from one sideonly nearly their entire width, so as to be bent to match said knives,the cross-kerfing of some of these tillers being from the right side andthat of others from the left side. From the fact that the spacers aretapered in the direction of their depth, as well as longitudinally, andtheir veneer plies are necessarily outermost the cutting of thesespacers from abuilt-up block is expensive, because of waste in thematter of time and material. This type of spacer is also unsatisfactoryiu practice, because its veneer ply or plies become unglued and fallaway, to the detrimentof the engine and stock therein u nder treatment.

Ourinvention has forits object to cheapenV production of wood spacersfor the shells and cores or cones of paper-stock engines, as well as toavoid the objections to the built-up type of such spacers, and toprovide spacers for the use specified that are universal in the matterof bending to match angular knives and which may be turned end for end,aocording to the direction ofthe taper of the spaces they are to lill,said invention consisting in what is hereinafter particularly set forthwith reference to the accompan yin g drawings and subsequently claimed.

Figure l of the drawings represents a plan view of one form of Woodenspacer in accordance .withl our invention partly broken away,

the same being designed for the lshell of a paper-stock engine; Fig. 2,a side elevation of the same; Figs. 3 and 4, vertical transversesections of said spacer, respectively indicated by lines 3 3 and 4 4 inthe rst figure; Fig. 5, a perspective view of another form of ourimproved spacer, the same be ing designed for acore or cone of apaperstock engine; and Fig. G, a transverse section of the latter formof spacer.

Referring by letter to the drawings, A indicates a wood spacer forknives of the shell of a paperstock engine, and A' a wood spacer forknives of the coreor cone of such an engine, each of these spacersbeinga stick having one or more kerfs b its entire length from bothsides toward the center adjacent to its outer face, a thin central webof material being left betweenopposite kerfs, and in practice thematerial outermost from the kerfs is broken away in a strip when theadjacent knives are worn close to what is then the outer face of thefiller.

The, spacer A is shown provided with a plurality' of longitudinal kerfsb from each side thereof toward the center, whereby this form of spaceris made to provide for the breaking away from the same of a plurality ofouter strips in successive order from time to time as adjacent knives ina paper-stock engine become worn in practice. Spacer A is also shownprovided with transverse kerfs c from both sides toward the centerintermediate of its ends, this kerfing being as deep as the longitudinalkerfs aforesaid and permitting the bending. of said spacer either rightor left to match angular knives between which it may be interposed. Theends of the spacer are cut square, and said spacer may be turned end forendas the taper of the space it is toA till may require.

The'spacers are tapered in the direction of their depth and length, asis customary with devices of this character, andsaid spacers being sawedfrorna single block the latter may be manipulated by the sawyerto savetime and material that-is necessarily wasted in cutting spacers frombuilt-up blocks. We also save the time and labornecessaryto the makingof blocks from which to cut built-up spacers.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. A Wood spacer for interposition between knives of the shell or coreof a paper-stock engine and which consists of a stick provided withopposite longitudinal kerfs adjacent to its outer face. v

2. A wood spacer for interposition between knives of the shell or coreof a paper-stock engine and which consists of a stick provided with aplurality of longitudinal kerfs from each side thereof toward the centeradjacent to its outer face. g

3. A Wood spacer for interposition between angular knives in apaper-stock engine and which consists of a stick provided with oppositetransverse kerfsintermediate of its ends.

4. A Wood spacer for interposition between angular knives in apaper-stock engine and which consists of a stick having opposite1ongitudinal kerfs adjacent to its outer face and opposite transverseVkerfs intermediate o't its ends.

In testimony that We claim the foregoing We have hereunto set our hands,at Appleton, in the county ot' Outagannie and State of Wisconsin, in thepresence of two Witnesses.

MARTIN P. VAN RYZIN. HERMAN G. SAECKER.

Witnesses:

E. F. OLMSTEAD, P. M. CONKEY.

